Distribution and characteristics of microplastics in sediment at representative dredged material ocean dumping sites, China

Dredged material ocean dumping activities are likely an important source of microplastics (MPs) in coastal areas but have received little attention globally. In this study, we investigated the spatiotemporal distribution and characteristics of MPs in sediments at eight dredged material dumping sites...

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Bibliographic Details
Published in:Marine pollution bulletin 2023-08, Vol.193, p.115201-115201, Article 115201
Main Authors: Yi, Yuying, Kong, Lingna, Wang, Xiaomeng, Li, Yuxia, Cheng, Jiayi, Han, Jianbo, Chen, Hong, Zhang, Naidong
Format: Article
Language:English
Subjects:
China
Dredged materials
Environmental Monitoring - methods
Geologic Sediments
Marine sediment
Microplastics
Ocean dumping site
Oceans and Seas
Plastics
Water Pollutants, Chemical - analysis
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Summary:Dredged material ocean dumping activities are likely an important source of microplastics (MPs) in coastal areas but have received little attention globally. In this study, we investigated the spatiotemporal distribution and characteristics of MPs in sediments at eight dredged material dumping sites of China. MPs were separated from sediment through density flotation, and polymer types were identified using μ-FTIR. The results showed that the average MP abundance was 112.82 ± 109.68 items/kg d.w. The MPs were more abundant at nearshore dumping sites than at distant dumping sites. Dumping activities may be the main contributor of MPs to Site BD1, the farthest dumping site from shore, but only a minor source of MPs at the other dumping sites. The characteristics of MPs were dominated by transparent PET fibers
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2023.115201